This is serious matter about telegram ICOs group im too always recieved so many DM claiming that they are the admin and they want to prioritize me for their ICO sale just sending ETH to some address I never replied to this kind of shit. This kind of scammer is dangerous keep sending to random people till they scam one. But I also saw many ICO that giving notice about this scammer so people will be aware and wont fall to this kind of scheme.
One should never send ETH no matter what to any single individual during an ICO. Even if the admin asks for it, the answer should be no. Money should only be contributed to the website through the portal provided.